[VAC] Re: Electrical woes

[Howard Lefkowitz <wa3vez@xxxxxxxxxxx>]

A fully charged battery is from 12.6 to 12.75 volts.  Right after charging
(with the charger removed) you can measure 13+ volts.  This is will only
last a few minutes when you put a load on the battery (turn on a light).  If
your device only works on 13+ volts forgetaboudit.  It will never work on
your coach batteries since there are always other "sneak loads" which will
rapidly drop the voltage.  Your car battery has no other loads so it will
stay up at 13 volts a lot longer.  Still not a good situation.  There are
switching type regulators that will provide a regulated output of 13+ volts
from a 12.0 or less source.  Check the power requirement of the DVD and TV
and see what power is required to size a voltage regulator.

Howard